Black Holes The term black hole was first used in 1969 by the American scientist John Wheeler to describe an object that had such a huge gravitational pull that not even light could escape it, thereby rendering it invisible or black. John Michell extended upon this idea in a paper called the "Philosophical Transactions of the Royal Society of London" in which he pointed out that a star that was sufficiently massive and compact would have such a strong gravitational pull that not even …show more content…
If the star is of a small to average size it will shrink down dramatically until it becomes a white dwarf - when the sun eventually becomes a white dwarf it will be about the size of the earth! A white dwarf has an extraordinary density - about one teaspoon taken from a white dwarf could weigh as much as a mountain!
The second possibility occurs if the star is very large. The star will throw out its outer layers in a terrific explosion, this is called a supernova. The star will then begin to contract under the force of gravity. But unlike the first possibility, this star will not be able to halt its collapse. The star will become smaller and smaller until it gets to the point where it has become infinitely dense and infinitely small - the singularity of a black hole.
A black hole consists of two main parts, a singularity and an event horizon. The event horizon is like the "skin" of a black hole, once you pass the event horizon there is no escape. The horizon is often referred to as the clothes of the black hole, as it is a barrier that separates the singularity from the rest of the universe. The event horizon can be seen by rays of light that are caught in a perpetual orbit around the black hole - unable to escape yet unable to fall in.
The singularity is what is found at the very center of a black hole; the singularity is a place of infinite density, infinite
(2015). Extra dimensions, graviton and tiny black holes. Retrieved 8 13, 2015, from CERN: home.web.cern.ch
The existence of black holes was first theorized by John Mitchell in 1783. Mitchell accepted Newton’s laws of gravity and suggested that light escaping from the surface of a star would have its speed reduced due to the gravitation pull of the star, and therefore if a star’s gravitation pull was strong enough even light would not be able to escape.[1] Using the approximate speed of light he reasoned that if an object was approximately 500 times the mass of the sun light would not be able
This paper will introduce you to the incredible topic which is black holes. A black hole is a region of space time exhibiting such strong gravitational effects that nothing can escape from inside it. (NASA) No human has ever entered a black hole and there is still a large mystery about them; we have very little idea of where the matter that enters them goes. A black hole cannot be looked into either, as it sucks all the light into the middle of it. Space programs use special satellites with certain features that allow them to see these black holes. A black hole can be big or small, sometimes forming when a star is dying. Some scientists speculate that there can be black holes just 1 centimeter large. There are multiple types of
Throughout the modern era of astronomy, a single type of celestial object has puzzled astronomers more than any other. Black holes, whose existence was only verified in the early 1990’s, have fascinated scientists ever since Einstein first proposed the theoretical concept in the 1930’s. A black hole is an object so tiny, but also so dense, that it has the power to pull planets, stars, and even light into its core, and ultimately destroy everything in its path. Over the past decade much has been discovered about these enigmas of space and time; however, many of these recent discoveries lead to more unanswered questions. Nevertheless, the basic life cycle of a black hole is now understood in ways thought to be impossible only twenty years
Black holes are some of unusual and most interesting objects found in outer space. The first thing I learned, black holes are objects of the greatest density due to the strong gravity because mater has been squeezed into a tiny space. With the black holes relationships with mass and gravity, they have an extremely powerful gravitational force that even light cannot escape from their grasp if it comes near enough. Second thing I learned is about the inner region of a black hole, where its mass lies, is known as its singularity, the single pint in space-time where the mass of the black hole is concentrated. The third thing I learned that I found the most fascinating is if the earth ever falls into a black hole, one of the effect that will happen is “spaghettification,” which means if objects come too close to a black hole, it will stretch out, just like a spaghetti. This effect is brought about by a gravitational gradient across the object or a body. For example, if earth comes too close to a black hole, the nearest part of the planet will be pulled by an enormous gravitational pull, while leaving the farthest part with a small gravitational force. The fourth thing I learned is that the new hypothesis suggests that anything that touches a black hole will become an
Have you ever heard of something getting sucked up in a black hole? Did it ever cross your mind as to what a black hole actually was? Well, a black hole is a rather large star that underwent a supernova explosion and since there was no gravity it collapsed in on itself. It is a big hole of nothingness that stays in outer space but does not suck up everything. Now lets get into more of the facts about black holes.
The sixty-symbols website has quite the collection of intriguing astronomical theories and interviews, but I specifically chose that of the black hole that contains interviews by Omar Almaini, Ed Copeland, Tony Padilla, Meghan Gray and Mike Merrifield from the University of Nottingham. The video began by a man revealing to his audience that he is often questioned about his personal opinion on black holes, which he informs us that “of course” he sees them as frightening and intimidating but goes on to refer to them as “cuddly”. Upon further explanation he points out two small (but different sized), round, black balls of fabric (that seemed to be knitted) that were gifts for his sister-in-law and they are meant to be representation of black holes with their solid black exterior. This seems like a useless example, but after thinking about it more critically I realize that I wasn’t
A star will begin to formate in the densest and keenest regions of space in enormous sized
There are two main reasons why humans cannot see black holes and one of the reasons is that black holes are black and cannot be seen because they blend in with the darkness (“Black Holes – NASA”). The second reason is that they are too far away to be seen even with incredibly powerful telescopes (“Black Holes – NASA”). There are also some tools that allow people to see the effects of what a black hole can do to different kinds of matter in space near them (“Black Holes – NASA”). By using a radio telescope in the Southern Hemisphere scientists can see the particle jets coming out of a black hole and have made a detailed drawing of what it looks like (“Black Holes – NASA”). Scientists
Charlie sat on the chaise in their suite, feet propped up on a pillow, watching as Bass paced the floor. “Bass, we’ve only been over this a dozen times,” she said, her voice oozing with comforting patience as she ran down his list of bullet points, conveniently written out for her.
Black holes should probably not be called black holes. In fact, black holes are anything but empty space. Black holes are a great amount of matter packed and squeezed into a very small area. The result of this amount of matter squeezed into a small area results in a gravitational field so strong that nothing, not even light, can escape.
White dwarf is very small with diameter as the Earth and mass similar to the Sun formed when the core of red giant collapsed. The maximum mass a white dwarf can have is about 1.4 solar masses which is known as Chandrasekhar limit. A single star can be one mass at the start of life and still evolve into a white dwarf being 0.6 mass compressed into approximately the volume of the Earth. Even though it is hot, it is not as bright compared to its temperature of more than 8000° C. However, they cool down and fade over billions of years.
The definition of a black hole according to Sea and Sky is “The collapsed core of a massive star. Stars that are very massive will collapse under their own gravity when their fuel is exhausted. The collapse continues until all matter is crushed out of existence into what is known as a singularity. The gravitational pull is so strong that not even light can escape.” Seasky.org, cited 2016: “Black hole”. Glossary of Astronomy. [Available online at http://www.seasky.org/astronomy/astronomy-glossary.html#B]. Black holes are not visible to the human eye. Since they are so dense, light is not able to escape them resulting in them being invisible. Special tools are required for them to be discovered and located with telescopes. This is done by seeing how stars close to them act different from others.
Another method in physics on how to time travel is through black holes. A black hole has been discovered by Einstein's theory of general relativity, which showed that when a star dies, it leaves behind a small, dense remnant core. If the core’s mass is more than the sun, the force of gravity overwhelms all other forces in which it transforms into a black hole. Scientists have said that black holes can destroy anything that goes in it and it could be hard to get out of a black hole, once something went in it. In an interview by physicist Lior Burko, he states, “One possibility is that black holes may allow us to travel to very remote places in the universe, or another universe entirely,” (Kahney, “Black Holes and Space Time”). Black holes may have evidence that there are different kinds of parallel universe. Even though it is still unclear what black holes can do as in destroying everything that it goes in or if it leads someone to time travel into another parallel universe. Scientist are trying to create a black hole, here on earth, to see what blacks can do as in sending information to another universe.
I have always had an interest in science, especially in the sciences regarding outer space. When I was younger I was always fascinated with rockets, and especially in stars. I have often regretted not pursuing this interest at its infancy. I do remember going to the Planetarium, and studying about a topic that I had seen talked about on television. The topic was black holes, and back then all that they knew was that they were black. The idea of a space in the universe that is completely void of light was difficult to imagine. Recently, I have learned more about this topic and a science call cosmology. I had never even heard of this field of science before I was introduced to a scientist by the name of